[Plugin: NextGEN Gallery] Make thumbnail as link?

The gallery insert from the NexGen plugin works real great. BUt I want to see if I can do this:

– How to turn the thumbnails in the gallery display into a link (leads to another page/a full post)? The default is a mouseclick on a thumbnail will show the lightbox enlargement of the image.

– The original image for my thumbnails are tall images; is it possible to change the size and ratio of the thumbnails without distorting the image in it?

Thanks,